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@ditch taten stcnt @frn Letters .Patent No. 80,164, dated July 21, 1868.

IMPROVED HORSE-POWER.

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To -ALL WHOM ytratar CONCERN;

` Be it known that I, MICHAEL G. GROFF, of.Vog ansville, in the countyof Lancaster, and State of Pennsylvania, have vinvented new and usefulImprovements on a Combined Jack and HorsePowergand I do hereby declarethat the following is a. full, clear, and exact descriptionv of theconstruction and operation of the same,' reference being had to theaccompanying drawings, making a part of this specification, in which-Figure `1 is a perspective drawingof the jack and horse-power coinbined.`Figure 2, a plan view of the horse-power. Y

Figure 3, side elevation and portions enlarged. Figure 4, the gear ofthe jackV in part. i. The nature of my invention consists in" bringingthe gearing in a horizontal. line, and so arranged as to divide thefriction, and consequent wear, counterpoise the pressure, and toincrease the power and -durability of the machine, together with astationary platform and. minor improvements.T To enable others skilledin the art to malte and use my invention, I will proceed to describe itsconstruction antloperation. n v

The mainsor sweep-wheel A is in a horizontal position, say six feet in`diametenheld in a. square frame, K K K K, at four points, hybracket-plates. These frnme-pieces have one end extended, as shown. Acrossbrac'e, cLmay also be added, as shown by the` dotted lines in g. 1,as is common for connecting the draught of the horses, being simplylevers for turning the main wheel A.

This Wheel has centrally-raised cogs, slightly brevelon the upper .andlower surface, leaving a. planeiiange on both the inner and outercircumference. `This flange, on the inside, is embraced by a series ofpulleys, D, having overlapping flanges, which 'answer forfriction-pulleys, as well asto support the main wheeh )therfriction-rollers, I J, fig-3, may be employehfas in other instances.

l The pulleys K are held in brackcts attached to the fo'ur posts `E,'-an1 also otherwise to thc frame G G' H, `to which the posts E areirmly'fastcnod and stayed by cross-pieccs or otherwise.-

A'shaft, I3, having its bearings -monnted in the 'front 'and rearcross-pieces GG', is provided with two pinions, C C, said shaft beingslightly-inclined, so that the one meshes into the co'gs of the uppersurface of the main `vrl1eel,^m1d the other nfthose on its lowersurface.` This shaft is connected, by means of a universal joint, L F,tothe shaft M, that drives 4the joel-e0, or outside gear and band-wheel N,fig. 1.

The 'jack O is also provided with cogs -on cach side, and angearound thecircumference,vto which the' brackets orl curi-eil arms z arc aiiixed,standing bliquely to the shaft T, so that the tw'o pinions t mesh intoAthe cogs on the/opposite sides of the same. v l i l The shaft 'I hasitsbearingsin a bracket on the rear cross-piece q, and box or journalontheside-piece r. To this shaft the band-wheel N is ai'lxedff l Acircular or square stationary platform is supported onthe fposts E.

Fig'.` 1 shows a lever in a slot, forV arresting themotion when stoppingthe machine to loek` the shaft. I Qtherminor details are suggested,`ti'hichlform no part of my invention. .t V

I ain aware that, independently eonsideredthe various` parts forming thecombination are not new, but' the arrangement of these several partsconstitutes this a horse-power differing substantially from any other ofthe machincs'oi' the like kind heretofore in use, and, as a whole, husacombination `of features that makes it peculiarly valuable;V and itisconfidently believed that, by this arrangement, the wear is lessened,andthe leveragefof the circumference .of the inain andjack-wheel.obtainedV at ltwo pointston the same shaft, in a manner todivide the ordinary pressure, while the horse, pulling on one lever-arm,also pnshe's, so that -the same force applied to move Athe one'pinion inPulling, exerts the samel leverage on. the other nd of the shaft andpinion by pushing, and must necessarily greatly reduce the power, evenif the frictiombesomewhat increased, as a, fair trial of'the machin'ehasclearly proved.

What I claim as my invention, and desire-to secure by Letters Patent,is-

lThe peculiar arrangement of the main wheel A and jack O, with thehorizontal or inclined shafts T B, having each two pinions, the genrconnected by the shaft M, which is provided with universal joints,substantially combined in the manner and for the purpose specified.

In combination with my arrangement in the gearing aforesaid, I nisoclaim the stationary'platform, supported substantially in the mannerspecified. I also claim attaching the spokes or arms z on theoutercircumference of a wheeLYO, which wheel has cogs on both sides, whensaidspokes or arms are so curved as to admit the free action of apinion, t, o n each side of the face of said wheel, in the manner shownand for the purpose'speicied. t

' Y MICHAEL G'. GROF.

Witnesses:

WM. B. WILEY, C. S. HOFFMAN.

